sw.js

const VERSION = 'mote-v6';
const STATIC_ASSETS = [
  '/',
  '/index.html',
  '/favicon.svg',
  '/icon-192.png',
  '/icon-512.png',
  '/apple-touch-icon.png',
  '/manifest.webmanifest'
];

self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(VERSION).then((cache) => cache.addAll(STATIC_ASSETS))
  );
  self.skipWaiting();
});

self.addEventListener('activate', (event) => {
  event.waitUntil(
    caches.keys().then((keys) =>
      Promise.all(keys.filter((k) => k !== VERSION).map((k) => caches.delete(k)))
    )
  );
  self.clients.claim();
});

self.addEventListener('fetch', (event) => {
  const req = event.request;
  if (req.method !== 'GET') return;

  const url = new URL(req.url);
  if (url.origin !== self.location.origin) return;

  // Network-first for navigations and same-origin requests; fall back to cache.
  event.respondWith(
    fetch(req)
      .then((res) => {
        const copy = res.clone();
        caches.open(VERSION).then((cache) => cache.put(req, copy)).catch(() => {});
        return res;
      })
      .catch(() => caches.match(req).then((hit) => hit || caches.match('/')))
  );
});